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UC3845AD8 from UC

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5.005ms

UC3845AD8

Manufacturer: UC

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3845AD8 UC 69 In Stock

Description and Introduction

Current Mode PWM Controller The UC3845AD8 is a high-performance current-mode PWM controller manufactured by Texas Instruments.  

### **Specifications:**  
- **Manufacturer:** Texas Instruments  
- **Package:** 8-Pin SOIC (D8)  
- **Operating Voltage Range:** 8.4V to 30V  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Current Sense Threshold:** 1V  
- **Error Amplifier Bandwidth:** 1MHz  
- **Start-Up Current:** <1mA  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
The UC3845AD8 is a fixed-frequency PWM controller optimized for high-performance DC-DC converters. It features current-mode control for improved loop response and includes an onboard oscillator, error amplifier, current sensing comparator, and a totem-pole output stage.  

### **Features:**  
- **Current-Mode Operation** for precise control  
- **Automatic Feed-Forward Compensation**  
- **Latching PWM for Cycle-by-Cycle Current Limiting**  
- **Undervoltage Lockout (UVLO)** with hysteresis  
- **High-Current Totem-Pole Output** for driving power MOSFETs  
- **Internal Trimmed Bandgap Reference** (5V ±1%)  
- **Low Start-Up and Operating Current**  

This device is commonly used in offline and DC-DC power supplies, battery chargers, and SMPS applications.

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